You can create a Pick'Em pool from The Action Network app (version 3.0 or higher).
On the 'My Action' tab, you'll see the 'Pools' section under today's action. Click 'Start New Pool' to get started.
From there, you can select the settings for your pool and invite your friends and followers. Once your pool is created, you can still change your pool's name, invite more friends and change your pool notification settings.